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Brachiosaurus altithorax Riggs 1903 (brachiosaurid)

Reptilia - Saurischia - Brachiosauridae

PaleoDB taxon number: 54864

Alternative combinations: Astrodon altithorax, Brachiosaurus (Brachiosaurus) altithorax

Full reference: E. S. Riggs. 1903. Brachiosaurus altithorax, the largest known dinosaur. American Journal of Science, series 4 15:299-306

Belongs to Brachiosaurus according to M. D. D'Emic 2012

Sister taxon: Brachiosaurus (Brachiosaurus)

Type specimen: FMNH P25107, a set of postcrania. Its type locality is Riggs Quarry 13, Fruita (FMNH), which is in a Kimmeridgian/Tithonian channel siltstone/sandstone in the Morrison Formation of Colorado.

Ecology: ground dwelling herbivore

Average measurements (in mm): coracoid length 870.0, femur length 2193.4, humerus 2221.9 x 240.0, ilium length 1124.0, scapula length 2190.0

Estimated body mass: 45.5 tons based on femur length